EP0786789B2 - Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut - Google Patents

Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut Download PDF

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Publication number
EP0786789B2
EP0786789B2 EP96810588A EP96810588A EP0786789B2 EP 0786789 B2 EP0786789 B2 EP 0786789B2 EP 96810588 A EP96810588 A EP 96810588A EP 96810588 A EP96810588 A EP 96810588A EP 0786789 B2 EP0786789 B2 EP 0786789B2
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EP
European Patent Office
Prior art keywords
yoke
pole plates
magnetic
yoke according
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96810588A
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German (de)
English (en)
Other versions
EP0786789A3 (fr
EP0786789B1 (fr
EP0786789A2 (fr
Inventor
Dominique Girardin
Signmar Kollol
Siegfried Mayer
Siegfried Münzer
Gerhard Schneider
Günter Seidenstücker
Wilfried Strenger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
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ABB Schweiz AG
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Publication date
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements

Definitions

  • the invention is based on a yoke for a preferably in a residual current circuit breaker (RCD) deployable magnetic release with a yoke and a movable armature having magnetic circuit, the yoke containing two fixed Polblechen and the two pole plates to form a magnetic Resistance of predetermined size separated by spacer means and held together by at least one connecting element.
  • a yoke serves to guide a constant magnetic flux from a permanent magnet to the moving armature. If the permanent magnetic flux is weakened by a signal emitted by a tripping coil and attributable to a fault current, for example, the armature loaded by a prestressed spring is lifted off the yoke and then triggers a force transmission member.
  • the power transmission member acts on a switching mechanism, which causes an opening of the contact arrangement of the FI-switch.
  • the input signal supplied to the trip coil is in this case proportional to the fault current and is formed by a summation current transformer of the FI switch.
  • the invention relates to a prior art, as in EP 0228 345 B1 is described.
  • a specified in this prior art yoke for a built-in an RCD magnetic release essentially has two fixed arranged Polbleche and a non-magnetic diaphragm on.
  • the diaphragm separates the two pole plates to form a magnetoresistor of predetermined size, thus preventing short-circuiting of the magnetic flux fed by a permanent magnet into the magnetic circuit.
  • the diaphragm generally consists of a metal sheet or a foil, in particular of mica, copper or a copper alloy, but may also be formed as a coating, which is mounted on the surface of at least one of the two pole sheets.
  • a thin air gap can be provided between the two pole plates.
  • screws or bilaterally welded bolts made of a magnetically non-conductive or only very poorly conductive material are generally used. Since the attachment of the connecting means can not be readily automated, the production of a trigger provided with such a yoke is relatively expensive.
  • Magnetic releases known from this prior art have a magnetic circuit with two pole plates which are magnetically isolated from one another by a diaphragm. These pole plates and an optionally provided intermediate piece are optionally connected by screwing, welding or gluing together.
  • the object of the invention is to provide a yoke for a deployable in particular in a FI-switch magnetic release, which can be prepared in a simple and in a manner suitable for large numbers.
  • the yoke according to the invention is characterized by high mechanical strength and good magnetic properties and can be produced with little time and material. All process steps involved in the manufacturing process can easily be performed by robots. Therefore, the yoke can be produced according to the invention in a cost effective manner and in large quantities in a fully automatic production line.
  • the in Fig. 1 Shutter shown has a consisting of a trough-shaped bottom 1 and a lid 2 insulating housing.
  • an opening 3 is provided, which the vertical guidance of a Power transmission member acting cylindrical ram 4 is used.
  • the plunger 4 has a thickened lower end, which is seated on a spring 5.
  • the upward end of the plunger 4 acts via a switching mechanism on a contact arrangement of the FI-switch, not shown.
  • the spring 5 has two blade ends 6 and acting on the plunger 4 middle part 7. At the middle part 7 not designated fasteners are provided for holding a cuboid-shaped armature 8 of a magnetic circuit on the side facing away from the plunger side of the central part. 7
  • the magnetic circuit also includes a yoke 16 formed by two pole plates 13, 14 and a magnetically poorly conducting air gap 15 and a constant magnetic flux flowing into the yoke 16.
  • the intended air gap 15 spaces the two pole plates 13, 14 from each other, thus preventing a short circuit in the magnetic circuit. It is so dimensioned that between the two pole plates 13, 14 is a magnetic resistance of a predetermined size.
  • FIGS. 2 to 5 the structure of the yoke 16 can be taken.
  • the two pole plates 13, 14 are joined together by means of two connecting elements.
  • an air gap is arranged between the two Polblechen.
  • 22 denotes a cuboid-shaped projection on the pole plate 14, which serves to support a trip coil, not shown.
  • the Polblechansatz 22 has at its free end on a flat surface 18, on which when the shutter is closed, the one end of the armature 8 (FIG. Fig.1 ) rest. The other end of the armature 8 then rests on a plane 19 formed in an unnamed approach of the pole piece 13 flat surface.
  • the connecting elements are designed as welding points 20, 21 and are arranged on mutually opposite edges of the two Polbleche 13, 14. Therefore, they bridge the two pole plates 13, 14 each web-shaped.
  • the welding point 20 is attached to the upper edges and the welding point 21 at the lower edges of the two Polbleche 13, 14.
  • three or more welding points can be attached.
  • the welds also act as a spacer.
  • the welding points are produced with the aid of a laser and, at least in the area of the webs, have material which has been produced during the manufacture of the welding point by melting the material of the two pole plates.
  • the intensity, the dimensions and / or the duration of action of the laser beam are in this case controlled so that the cross section and length of the poles 13, 14 bridging webs are determined by the predetermined size of the magnetic resistance between the two pole plates.
  • the magnetic flux flowing through each of the lands is approximately proportional to the saturation induction of the pole sheet material and the cross-section and length of the land.
  • the cross section of the webs is typically 0.1 to 1 mm 2 , preferably 0.2 to 0.5 mm 2 .
  • the reduced by the webs magnetic resistance can be increased by an increase in the thickness of the air gap or compensated by an increase in the permanent magnet 17.
  • spacers of typically 50 microns thickness between the pole plates 13, 14 are inserted.
  • three spacers made of wire are provided at the edges of the pole plates, which are removed after the production of the welds.
  • the lying between the two Polblechen magnetic resistance vorweer size is then determined by the air layer between the pole plates and the geometric dimensions of the webs of the welds.
  • the magnetic resistance between the two pole plates can be significantly increased by using a suitable formed in the form of a wire, suitable additive during welding.
  • a suitable formed in the form of a wire, suitable additive during welding.
  • fusible alloying of material of the two pole sheets and material of Rajschweissstoffes an alloy which is magnetically much less conductive with a suitable choice of Rajschweissschers as the material of the Polbleche.
  • Particularly suitable additional welding materials are copper and copper alloys and steel-nickel alloys with a ferromagnetics low relative permeability, such as X12CrNi17 / 7.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)

Claims (7)

  1. Culasse (16) pour un disjoncteur de champ magnétique pouvant être inséré de préférence dans un interrupteur de protection contre les courants de court-circuit, avec un circuit magnétique dans le fer présentant la culasse (16) et un induit (8) mobile, où la culasse (16) contient deux plaques de métal polaires (13, 14) fixes et où les deux plaques de métal polaires (13, 14) sont séparées l'une de l'autre par des moyens d'écartement en formant une résistance magnétique d'une ampleur prédéfinie et sont retenues ensemble par au moins deux éléments de liaison, où les deux plaques de métal polaires (13, 14) sont distanciées l'une de l'autre par une discontinuité magnétique, caractérisée en ce que les éléments de liaison sont développés respectivement en tant qu'emplacements de soudure (20, 21), lesquels emplacements de soudure (20,21) enjambent respectivement en forme de traverse les deux plaques de métal polaires (13, 14) et agissent respectivement en tant que moyens d'écartement.
  2. Culasse selon la revendication 1, caractérisée en ce que la traverse d'au moins l'un des emplacements de soudure (20, 21) présente de la matière qui s'est formée lors de la réalisation des emplacements de soudure par fonte de matériaux des deux plaques de métal polaires (13, 14).
  3. Culasse selon la revendication 2, caractérisée en ce que le profil transversal et la longueur des traverses enjambant les plaques de métal polaires sont déterminés par l'ampleur prédéfinie de la résistance magnétique entre les deux plaques de métal polaires.
  4. Culasse selon la revendication 3, caractérisée en ce qu'avec un écartement entre les plaques de métal polaires (13, 14) d'environ 20 à 100 µm, le profil transversal des traverses est de 0,1 à 1 mm2, et de préférence de 0,2 à 0,5 mm2.
  5. Culasse selon la revendication 1, caractérisée en ce que la traverse d'au moins l'un des emplacements de soudure présente de la matière qui s'est formée lors de la réalisation de la liaison de soudage par alliage fusible de matériaux des deux plaques de métal polaires et de matériaux d'une matière à souder additionnelle.
  6. Culasse selon la revendication 5, caractérisée en ce que la matière à souder additionnelle est formée par du cuivre, un alliage à base de cuivre ou un alliage d'acier et nickel avec une faible perméabilité relative.
  7. Culasse selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'un au moins des éléments de liaison développé en tant qu'emplacement de soudure est réalisé par soudage au laser.
EP96810588A 1996-01-23 1996-09-06 Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut Expired - Lifetime EP0786789B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19602268 1996-01-23
DE19602268 1996-01-23

Publications (4)

Publication Number Publication Date
EP0786789A2 EP0786789A2 (fr) 1997-07-30
EP0786789A3 EP0786789A3 (fr) 2000-06-21
EP0786789B1 EP0786789B1 (fr) 2004-02-11
EP0786789B2 true EP0786789B2 (fr) 2009-01-14

Family

ID=7783429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810588A Expired - Lifetime EP0786789B2 (fr) 1996-01-23 1996-09-06 Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut

Country Status (3)

Country Link
EP (1) EP0786789B2 (fr)
AT (1) ATE259539T1 (fr)
DE (1) DE59610915D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19839637A1 (de) * 1998-08-31 2000-03-02 Cmc Carl Meier & Cie Ag Schaff Verfahren zur Herstellung eines Jochs eines Magnetauslösers und Vorrichtung zur Durchführung dieses Verfahrens
FR2877137B1 (fr) 2004-10-21 2006-12-22 Schneider Electric Ind Sas Declencheur electromagnetique et appareil de protection electrique le comportant
EP2718953B1 (fr) 2011-06-06 2015-09-30 Eti Elektroelement D.D. Relais électromécanique à culasse améliorée, en particulier relais pour l'interruption d'un circuit électrique dans le cas d'un courant différentiel, et interrupteur comprenant un tel relais

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT281965B (de) * 1967-01-20 1970-06-10 Siemens Ag Als Auslöser dienender elektrischer Haltemagnet
AT372217B (de) * 1980-11-04 1983-09-12 Biegelmeier Gottfried Haltemagnetausloeser hoher empfindlichkeit
ES2011457B3 (es) * 1985-12-13 1990-01-16 Cmc Carl Maier + Cie Ag Desconexion de iman para interruptores de proteccion de corriente de defecto
DE8801399U1 (de) * 1988-02-04 1988-04-28 Siemens AG, 1000 Berlin und 8000 München Haltemagnet-Relais
DE9210981U1 (de) * 1991-08-30 1992-10-29 Siemens AG, 8000 München Haltemagnetrelais

Also Published As

Publication number Publication date
ATE259539T1 (de) 2004-02-15
EP0786789A3 (fr) 2000-06-21
DE59610915D1 (de) 2004-03-18
EP0786789B1 (fr) 2004-02-11
EP0786789A2 (fr) 1997-07-30

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